Pumping-jack



H. T. SCOTT.

PUMPING. JACK.

APPLICATION FILE D AUG-18, I919. 1,384,638. Patented July 12,1921, I

2 $HEETSSHEET 1- ll Q 0 %6 15 a \L/ 20 1f IN VEN TOR.

W w ym ATTORNEY.

WITNESS:

H. T. SCOTT.

PUMPING JACK.

APPLICATION FILED AUG-I8. 1919.

1,384,638. Patented July 12,1921.

2 SHEETS-SHEET 2- WITNESS; .r HigI VTOR. BY .Zf]? c025 ATTORNEY.

UNITED STATES PATENT OFFICE.

PUMPING-JACK.

Application filed August 18, 1919.

To all 'w ham it may concern Be it knownthat I, HENRY T. ScoT'r, acitizen of the United States, residing at Wichita Falls, in the countyof l/Vichita and State of Texas, have invented'new and usefulImprovements in Pumping-Jacks, of which the following is aspecification.

This invention has reference to an improved pumping jack.

The object of the invention is to provide means on the walking beam of ajack for equalizing the dead weight of the pump sucker rod as well asthe column of fluid pumped, thus reducing useless load on the pumpingengine.

Other objects and advantages will present themselves as the nature ofthe invention is better understood, reference being had to theaccompanying drawings, in which there is illustrated a simple andsatisfactory exemplification of the improvement reduced to practice, itbeing understood, however, that the nature of the invention is such asto render the same susceptible to various changes in size, proportionand details of construction, all of such changes, however, fallingwithin the scope of what is claimed.

In the drawings:

Figure 1 is a side elevation of the improvement.

Fig. 2 is a top plan view thereof.

Fig. 3 is a sectional view approximately on the line 33 of Fig. 2.

Fig. 4 is a sectional view approximately on the line H of Fig. 1.

The base 10 for my improved pumping jack is preferably constructed ofoak timbers. On the side members of the base is secured the frame 11 forthe walking'beam. The frame 11 includes a member having spaced legs 12the lower portions of which being offset or arranged at an outward angleto provide feet 13, and these feet are secured to the base. The sidemembers or legs 12 of the frame 10 are braced by angularly arrangedmembers 14 that are secured to the said legs and to the base. The upperand straight portion of the frame 11 is bifurcated or is provided withspaced ears 15-15, and between these ears is arranged the walking beam16. The walking beam, to one side of the center thereof is provided witha plurality of spaced openings 17, and the ears 15 are provided withalining openings.

Specification of Letters Patent. Patented July 12, 1921 Serial No.318,377.

Passing through the last mentioned openings and through one of theopenings 17 in the walking beam is a pivot bolt 18 that has its threadedportion engaged by a nut 19. The end of the walking beam, farthest awayfrom the pivot 18 has removably suspended thereon a counter-balancingweight 20. The walking beam, adjacent its opposite end has connectedthereto a pitman 21, and the lower end of this pitman is pivotallyconnected, as at 23 to the saddle casting 24. The cast mg 24 hasconnected therewith a laterally extending axle 25 which finds hearingsin sultable block members 26 that are secured to the side members of thebase and that preferably have their outer surfaces contactmg with thelegs 12 of the frame 11. The saddle casting 2 1 has its inner endprovlded with or connected to an angle arm 27 which extends upwardly andwhich is prov ded, adjacent its outer end with any deslred number ofspaced transverse openings 28, any of the said openings designed toreceive the shackle rod or cable 29 that is connected with the engine orwith the mechanism for actuating the pump.

Outward of the pivotal connection of the pltman 21 with the walking beam16, the said walking beam is provided with a depending link 30, and tothis link is connected a rod 31 which in turn is connected to the pistonor pump sucker rod in the well casing.

The weight 20 on the walking beam serves to equalize the dead weight ofpump sucker rods as well as the column of fluid pumped, and consequentlyreduces useless load on the pumping engine. The improvement permits ofthe employment of a smaller engine that is usually employed in such workas well as considerably lighter shackle rods or cables in the operationthereof. The counter-balance is adjusted in two ways, first by theweight, second by the distance from the fulcrum or pivot 18 whichconnects the walking beam to the frame. No gearing is employed in theconstruction which consequently greatly reduces the cost thereof. Theshackle rod or cable 31 is adjustably connected to the angle arm, whichin connection with the saddle casting provides a bell crank lever sothat the stroke of the pump can be changed easily, according to thecapacity of the well which enables the engine to 0perate continuouslyunder steady load and which also balances the load on the engine when asingle engine operates a number of wells. 7 v

Having thus described the invention, what is claimed as new, is

In a'pumping jack, a base, a frame secured thereto and arisingtherefrom, said frame including spaced legs, brace members between thelegs and base, spaced ears on the outer end of the frame, a walking beamhaving spaced openings therethrough disposed nearer one end thereof thanthe other,

a pivot member passing through the earsa-nd through one of the saidopenings, a counter-balancing weight on the walking beam at the endthereof farthest from the pivot, a link pivotally secured to the walkingbeam adjacent to the opposite end thereof, a saddle casting having alateral axle connected to the link, bearings on the base for said axlecontacting with the arms of the frame, an angle arm secured to the freeend of the saddle casting, said arm having spaced transverse openingstherethrough clesigned to receive in any one thereof a shackle rod orcable which is connected to the operating engine for the jack, a link onthe end of the walking beam outward of the first mentioned link, a rodconnected therewith, said rod being connected with the sucker rod of apump.

In testimony whereof I afliX my signature.

HENRY T. scoTT.

